<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title></title>
<style>
div {
width: 300px;
height: 300px;
background-color: pink;
}
</style>
</head>
<body>
<input type="button" value="隐藏" />
<div ></div>
<script src="common.js"></script>
<script>
//获取按钮元素,注册点击事件,添加事件处理函数
my$("bt1").onclick = function () {
//判断当前点击按钮的value值
if (this.value == "隐藏") {
my$("dv").style.display = "none";
this.value = "显示";
} else if (this.value == "显示") {
my$("dv").style.display = "block";
this.value = "隐藏";
}
};
</script>
</body>
</html>